Fig. 6
The Gantt chart of the solution of Kacem instances. a The number of non-dominated solutions for four Kacem instances, b 4 jobs 5 machines (C M  = 11, W T  = 32, W M  = 10) c 8 jobs 8 machines (C M  = 16, W T  = 73, W M  = 13), d 10 jobs 10 machines (C M  = 16, W T  = 73, W M  = 13), e 15 jobs 10 machines